Step by step
- 01
Protect the reusable source
The clean PNG is the easiest version to reuse. Keep it out of public folders, shared photo albums, message history, and open cloud links. Delete unnecessary copies.
- 02
Share the document, not the asset
Place the signature in the intended PDF and send the completed document. Do not attach the standalone signature image unless the recipient specifically needs it.
- 03
Understand flattening
A flattened PDF turns editable annotations into page content, which can prevent simple repositioning in ordinary editors. It does not stop screenshots, image extraction, or deliberate copying.
- 04
Use stronger signing when the risk is higher
If the document needs verified identity, tamper evidence, or controlled signer access, use the recipient’s digital-signature or secure signing workflow instead of an image alone.
A practical handling checklist
- Restrict access to the original signature file.
- Keep unsigned and signed document copies separate.
- Do not promise that flattening makes a visible signature impossible to copy.
Questions
Does flattening prevent someone from copying my signature?
No. It can make normal annotation editing harder, but any visible mark can still be captured or extracted with enough effort.
Should I email my signature PNG?
Avoid sending the reusable asset when a completed PDF will do. Every extra copy increases exposure.
Can a password protect the signature?
Encryption or a document password can restrict file access, but once an authorized recipient opens the document, the visible signature can still be captured.